Github, my branch is behind master but it is correct. How do I overwrite master with the branch?

Question

These are the steps I did on my way to this question:

How to remove duplicated commits from filter-branch command on git?

My branch A which only has 300 commits is 900 commits behind master. However, the 900 commits that I removed on branch A are duplicates. How can I just make master have 300 commits like branch A?

you want to merge your branch to master or you want to remove the commits from master? — danglingpointer, Nov 21 '17 at 20:24
Remove the commits from master, but they are already removed on that other branch — Programmingjoe, Nov 21 '17 at 20:28
then just merge the branch A(in which you removed 900 duplicate commits) to your master? Are you getting merge conflicts or it says your branch is behind the master? — danglingpointer, Nov 21 '17 at 20:30
In the case of behind master, you might need to use force push if your the only person working on the repo or else other option is to use merge flag for fast forward. — danglingpointer, Nov 21 '17 at 20:37
Branch A is behind master. I tried force pushing Branch A into master and nothing happened. — Programmingjoe, Nov 21 '17 at 21:10

score 0 · Accepted Answer · answered Nov 23 '17 at 01:21

See original question: How to remove duplicated commits from filter-branch command on git?

This didn't seem to be working:

git checkout master
git reset --hard correct_branch
git push -f origin master

So I did:

git checkout master
git reset --hard old_commit_id_from_master
git push -f origin master

Github, my branch is behind master but it is correct. How do I overwrite master with the branch?

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